This is a pair of yunomi (teacups) made by Seiichi Onishi of Tamba ware, Hyogo Prefecture. These are traditional yakishime (unglazed, high-fired) yunomi. A long time ago, Mr. Onishi was a cheerful and friendly person who explained Tamba ware in an easy-to-understand manner. Size: Large: Diameter: 7.1 cm Height: 8.2 cm Small: Diameter: 6.5 cm Height: Approximately 7 cm Approximate measurements. Potter's mark: Tansei With a wooden box (kyobako), which is quite old. There is some deterioration. These are powerful Tamba yunomi. Thank you for your interest.